/usr/share/go-1.6/test/turing.go is in golang-1.6-src 1.6.1-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | // run
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Test simulating a Turing machine, sort of.
package main
// brainfuck
var p, pc int
var a [30000]byte
const prog = "++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.!"
func scan(dir int) {
for nest := dir; dir*nest > 0; pc += dir {
switch prog[pc+dir] {
case ']':
nest--
case '[':
nest++
}
}
}
func main() {
r := ""
for {
switch prog[pc] {
case '>':
p++
case '<':
p--
case '+':
a[p]++
case '-':
a[p]--
case '.':
r += string(a[p])
case '[':
if a[p] == 0 {
scan(1)
}
case ']':
if a[p] != 0 {
scan(-1)
}
default:
if r != "Hello World!\n" {
panic(r)
}
return
}
pc++
}
}
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